Working with an author on explaining what universal healthcare coverage would look like in the USA and came across this article. Here is an excerpt:
“The 11 southern states that are not moving toward Medicaid expansion are home to 2.7 million people with mental illness. Virginia, North Carolina, Tennessee, South Carolina, Oklahoma, Louisiana, Missouri and Mississippi each have between 100,000 and 200,000 such uninsured adults. Georgia has 233,000 residents who suffer from mental illness, according to data compiled through the Substance Abuse and Mental Health Services Administration.
These 25 states have about 55 percent of all uninsured people with mental illness, the Association reports. Mental health, including substance abuse, treatment is now included as an essential health benefit in all health insurance plans under the Affordable Care Act. That is, for those who aren’t left out.”

Single-payer’s advantage is that everybody is in, nobody is out. It is far more efficient, allows for better outcomes, saves lives, prevents injuries and illnesses, relieves people of severe anxieties and wasted time spent figuring out often fraud-ridden, inscrutable computerized bills and allows for the collection of pattern-detecting data to spot harmful trends.